Stonecutting device



Jan. 17, 1928.

R. FRENETTE STONE CUTTING DEVICE Filed March 19, 1927 2' Sheets-Sheet 1 fl i Z] Hi; Inventor Attorneys Jan. 17, 19281 R. FRENETTE STONE CUTTING DEVICE Filed March 19, 192.7

fieZzl fl'elzeile 2 Sheets-Sheet 2.

Inventor Attorney;

Patented Jan. 17,1928.

UNITED STATES rarer error.

REAL FRENETTE, OF ROSEIVIO UNT, MONTREAL, QUEBEC, CANADA, A$SIGNOR 013 ONE- HALF T WILFBID LEMOINE, 0F MONTREAL, CANADA.

' STONEC'U'ITING- DEVICE.

Application'filed March 19, 1927. Serial No. 176,737. a

The present invention relates to improvements in stone cutting and dressing devices andihas for its primary object to provide a device adapted to uniformly chisel or face the surfaces of buildingstones and the like.

A further object of the invention is the provision of a stonecutting device which will cut the surface of the stone and eliminate the danger of chipping the corners.

A still further object of the invention is to provide a device of the above character designed to be conveniently handledvby the workman and employed in association with a power driven hammer.

Another object of the invention is to provide a device of the above type having a resilient frame structure adapted to cushion the vibratory action of the hammer so as to reduce the vibration on the frame of the device. 1 1

Still another object of the invention is the provision of a stone facing device which is relatively simple and durable of construc-' tion and which can be conveniently handled by the stone cutter.

Other ob'ects and advantages of the in vention will become apparent as the description progresses.

In the accompanying drawing'forming a.

part of this specification and in which like referencecharacters'are employed to designate corresponding parts throughout the same Figure 1 is a side elevational view of the device in assembled position;

Figure 2 is a top plan view taken on the line 2-2 of Figure 1: i Figure 8 is a front elevational view of the hammer supporting frame;

Figure 4: is a similar view of the facinfi roller and roller supporting bracket: and

Figure 5 is an enlarged vertical transverse sectional view taken. on the line 5-5 of Figure 4. y

Referring to the drawing, wherein for the purpose of illustration is shown a preferred embodiment "of the invention. the nu meral 10 generally designates a roller brackst of inverted U-shaped formation embodying anupper horizontal cross bar 11 and parallel vertical side members 12. The centre of the horizontal cross bar 11 is formed with a central transverse recess in which is securely fixed a transversely extending plunger rod 13. The plunger rod 3 is fat] formed with an annular collar 14 adjacent its lower end, this collar resting on the up per edge of the bracket cross bar 11 as shown to advantage in Figure 5. The side members 12 of the roller bracket 10 are formed with transversely alined bearing openings adjacent their lower ends, these openings being adapted to receive a transverse roller shaft 15.

Fixed on the intermediate portion of the. shaft 15 and rotatable between the side members of the bracket'lO is a cylindrical roller 16 its outer periphery being cut to 1 form a plurality of tapered uniform spike-s 17 formed to provide relatively sharp points at their outer ends. The spikes 17 arepreferably of uniform formation and may vary in dimension for the particular application of the. stone cutting; device;

Mounted in association ivith the roller bracket 10 and normally extending in a horizontal position is an operating frame18 formed of continuous rectangular structure having its longitudinal side bars bent in are uate formation as indicated at 19. Theinterniediate side portions of the bars 19 are formed with apertured bearing collars 20 through which the ends of the roller shaft 15. areprojected. The extremities of the roller shafts are formed with transverse openings in which are detachably fitted cotter pins 21 adapted to prevent displacement of the shaft. shown to advantage in Figure 1; the end portions of the frame 18 are arranged in substantially horizontal alinement with the upper cross bar of the roller frame 10 and to which the ends of a longitudinal centre bar 22 are connected. The centre bar 22 is formed with a relatively large central opening through which the collar 14 of the plunger may be vertically reciprocated. An essential feature of this structure is the provision of a. centre bar formed of spring steel or other resilient material adapted to cushion the vibratory movement of the bracket and roller during the operation of the dressing device.

Detachably connected with the roller bracket 10 and normally extending upwardly in vertical position is ahammer supporting bracket 23 of inverted U-shaped formation having its side legs 24 diverging toward a lower end and provided with horizontal apertured cars 25 at their lower extremities.

' lie'upper transverse extension 26 of the ire bracket 23 formed with a central opening the purpose of which will later appear.

lhe bracket 93 in cmnuzctiul to the roller lnraelzetby means of a pair oi. side rods 27 formed with hooks 255 at their. lower ends engagcable witl the end portions of the roller bracket cross bar and extending vcrtically upward in diverging positions. The

upper end portions of the side rods 2'? are erated llfillllllfil indicated M230 is positioned vertically between the upper crossbar of the bracket 28 and the longitudinal centre bar 22 of the frame. This hannner may be pneumatically or electrically driven to reciprocally drive a hammer; The lower end of the hammer body 30 is "termed with a ver tical recess into which projects the plunger 13 of the roller bracket, the plunger being arranged in vertical alinement with thereciprocating hammer and cngageable therewithin the lowcrinoatposition of the hammer. Thus, when the hammer is operated, the hammer head will operate against the plunger and consequently, against the roller bracket 10 and spike roller It. In this man ner. the spike roller will perforate the face of the stones for the purpose of dressing the same. l

Due to the arrangement of the guide frame. thereciprocating impulse will not be directly,transmitted to the frame so that the operator can hold the hammer in accurate position and will not receive the complete vibration of the power hammer. Theupper hammer bracket 23 is arranged to resiliently maintain the power hammer-:30 in operative position on the plunger 13. 7

During the operation of the hammer, roller spikes 17 will be uniformly driven into the surFace oi the stoneand due to the compact uniform arrangement to obviate chipping the edges of the'stone. It will also be noted. that the device can be conveniently disassembled "tor shipping or storage purposes.

It is to be understood that the form of my invention herewith shown and described is to be taken as the preferred example of the same, and that various changes as to the shape, sine and arrangement of parts may be resorted to without departing from h spirit O'l tllE invention or the scope Oi the Slll'JjOlllGfl claims. y

Havingthus descrlbed my lnvention, I claim: a v

1. A device of the character descrlbcd hammer in association with the bracket projection formedthereon, and a hammer guide frame resiliently associated with the wheel bracket. i

A device of the character described comprising a U-shaped roller bracket, a

spiked dressing roller ournaled in the bracket, a rod secured in the upper transverse portion of the bracket, a hammer retaining bracket resiliently associated with the roller bracket and adapted to maintain a power hammer in operative association with the roller frame and rod, a U-shaped frame including a resilient central bar connected with the roller bracket for convenient opera tion of the roller.

4. A. device of the character described comprising a U-shaped roller bracket, in

spiked roller journaled on a transverse shaft extending through the roller bracket, 2.

plunger rod fixed in the upper cross bar of the roller bracket, a pair ofrods detachably connected with the roller bracket, a hammer supporting bracket slidably associated with the said rods and resiliently urged to a downward position, and a guide member including a rectangular frame journaled on the roller shaft extensions and having a resilient longitudinal centre bar connected at its ends. v v

5. A device of the character described comprising a roller supporting bracket, in plunger rod secured in the bracket and ex: tending vertically upward therefrom, a spiked roller journaled in the lower portion of the bracket, :1 guide frame resilientlyconnected wit-lithe roller bracket, and a hammer securing frame .detachably and resiliently connected to the roller bracket.

6. A stone dressing device comprising a roller supporting, bracket, a plunger rod fixed in the bracket, a roller formed with tapered spikes journaled in the lower portion of the roller bracket, a roller guide t'ramea'esiliently mounted on the roller bracket, and a hammer supportmgbracket resiliently connected with the roller bracket adapted to firmly secure a power hammer in association with the roller bracket and the plunger rod. it

In Witness whereof I have hereunto set my hand. FRENE 

